Mining scraper, manufacturing process thereof and mining scraper machine

The invention discloses a mining scraper blade and a manufacturing process thereof and a mining scraper conveyor, the mining scraper blade comprises a wear-resistant layer, a base body layer, a filling body and at least one connecting column, the base body layer is of a hollow structure, the filling body is filled in the base body layer, the base body layer at least wraps a part of the filling body, the base body layer is made of an alloy material, and the connecting column is made of an alloy material. The filling body is made of a high-molecular polymer material, the base body layer is coated with the wear-resistant layer, at least one through hole penetrating through the filling body is formed in the filling body, and the connecting column penetrates through the through hole and is fixedly connected with the base body layer. The mining scraper blade is a composite scraper blade of a sandwich structure with three-in-one of polymer filling, the alloy matrix and the wear-resistant layer, the structural streng